Nick Burkhardt's life is completely transformed when his family's legacy is revealed to him and he discovers that he is a Grimm, a monster hunter who can see the creatures for what they really are.

A barbaric family history is revealed when Nick and Hank investigate a case of breaking and entering. Meanwhile, Nick assigns Monroe to look after Aunt Marie.

Nick and Hank's investigation of a dead high school teacher leads them to the school's outcast, Roddy. Nick realizes that there's more to Roddy than meets the eye, and enlists Monroe's help to get through to the troubled teenager before he exacts revenge on the students who wronged him. Meanwhile, Nick learns that his presence is beginning to affect the creature world.

A failed robbery leads Nick and Hank to powerful rare coins. Meanwhile, a suspect in the case may have information regarding the death of Nick's parents.

Nick looks into a theft and murder at a spice shop and discovers that it was owned by a Wesen, and that the thieves were after a dangerous drug. Meanwhile, Hank falls under Adalind's sway and Wu gets caught in the middle.

Nick and Hank are called to investigate the mysterious death of a wealthy matriarch, after her stepdaughter loses everything in a Ponzi scheme. Meanwhile, Juliette does some digging into the mysterious death of Nick’s parents in an effort to help him find closure.

As Nick delves deeper into his life as a Grimm, a trail of grotesque murders reignites the search for the elusive gold coins.

After their face-off with Kimura, Nick finds himself trying to come to grips with the return of his mother, Kelly Burkhardt. A trail of brutal murders unveils a foreign conspiracy to hunt down Nick, leading to several revelations about his past. Meanwhile, Juliette still lies in her mysteriously-induced coma as Rosalee and Monroe work tirelessly to bring her out of it safely. Elsewhere, Hank struggles with the shocking truths he’s recently seen and Captain Renard deals with unexpected family issues when his estranged brother comes back into his life.

As Nick and his mother continue to battle the Mauvais Dentes, Monroe and Rosalee (Bree Turner) fight against the clock to save Juliette. More details are revealed about the source of Juliette’s illness, resulting in an epic showdown. Back at the precinct, Hank senses that something is amiss when Nick lands in hot water with the FBI. Meanwhile, Captain Renard continues to reveal himself as he deals with his estranged brother.

Adalind returns to wreak havoc as she avenges her mother's death; Captain Renard's obsession escalates; Monroe receives a surprise visit.

After Nick learns about Juliette and Captain Renard, he must deal with the consequences. Things get even more complicated when Nick is called to investigate his own crime. Meanwhile, the search for the key intensifies as Captain Renard finds Nick’s trailer and makes a surprising alliance. With Rosalee’s help, Monroe informs Nick that they might be able to stop what’s going on with Renard and Juliette before it goes too far. Elsewhere, Wu responds to a bizarre shooting at Nick and Juliette’s house.

Nick finds himself fighting a wildly different sort of nature freak in a desperate attempt to keep a volcano from burying Portland in lava. Meanwhile a pregnant Adalind meets a powerful new ally in Europe. Meanwhile, Juliette seeks out help after becoming overwhelmed by the latest side effect of her recovery – multiple memories of Nick showing up everywhere.

Nick and Hank discover a new kind of strange when they investigate suspects being found dead - for the second time. In Europe, Adalind finds herself in the middle of a feud between Frau Pech and Stefania while working over the details of her pending transaction. Meanwhile, determined to remember every last detail to get things started once more, Juliette insists Monroe share with her Nick’s darkest secret - the world of Grimms and Wesen.

Just when things look like they’re back to normal with Juliette, Nick is called to investigate a flurry of rage-fueled assaults happening all over Portland. He goes to Monroe and Rosalee for help battling Portland’s newest wave of "undead." As if that weren’t enough, Captain Renard informs Nick that his brother Eric is in town on family business. Meanwhile, Stefania and Frau Pech methodically use their alliances with Adalind to battle one another.

A panicked Juliette, Monroe, and Rosalee enlist Hank's help in fending off a zombie hoard while trying to figure out what happened to Nick. Knowing the truth, Captain Renard takes measures to help rescue Nick from the clutches of his brother, Eric. Elsewhere, along with the help of the mysterious Stefania, Adalind finds herself facing her most gruesome task yet in her effort to regain her Hexenbiest abilities.

Monroe, Hank, Rosalee and Juliette track down a manic Nick and do all they can to find him and reverse what's been done to him before he causes any more damage. Meanwhile, Captain Renard does his best to clean up the zombie fallout on all fronts - domestic and international. Elsewhere, the more time Adalind spends with Stefania, the more disturbing things seem to get in her quest to regain her Hexenbiest abilities.

Nick and Hank investigate a cop killer who scalps his victims. Meanwhile, Juliette begins to communicate with Nick's mom via email and Adalind finds herself much closer to delivering her baby than she previously thought. Elsewhere, Monroe's parents decide to surprise him and Rosalee with an early arrival to Portland after learning some exciting news.

Monroe fights an impossible battle to convince his parents to embrace the life choices he’s made. Meanwhile, Nick turns to Juliette to help him figure out the Wesen aspect of his cop-killing scalper investigation. On the Royal Baby front, Captain Renard learns new information that forces him to contact Adalind in the interest of keeping her and the baby safe from Viktor.

Nick and Hank investigate a dangerous female suspect leaving a trail of Wesen in her wake. Elsewhere, Adalind takes measures into her own hands, even if that means forging a dangerous alliance.

Rosalee and Monroe's big day arrives; a realization shakes Juliette and Nick's relationship to its core; Adalind's plan leads to a catastrophic event.

The team scramble to find a cure to get Nick's ability back.

The Gedächtnis Esser continues to steal memories and Captain Renard's mother visits him in the hospital to try to save his life. Meanwhile Wu confronts Nick about Trubel and Nick and Adalind share a psychic connection.

After Monroe’s abduction by the Wesenrein, Nick gathers the whole team, including Wu, to track him down and return him to Rosalee. As the search intensifies, Juliette learns more about her new reality as a Hexenbiest.

Nick and Hank investigate a series of murders that lead back to the Wesen Council and a mysterious bounty hunter. Elsewhere, Juliette’s meeting with Henrietta brings about more disturbing news than she was expecting. Meanwhile, Adalind and Viktor make their way back to Portland.

Nick and Hank investigate a homicide they discover is linked to a wesen rite of passage.

While investigating a grisly murder, Nick and Hank get closer to uncovering the identity of the serial killer while Wu's life is put in grave danger. Having turned down Monroe and Rosalee's offer, Juliette solidifies a new alliance as she works to get her revenge. Elsewhere, Trubel makes a surprising return to Portland.

Nick must look inside himself and decide who he wants to be while also dealing with fathering a child with Adalind.

Nick and Hank investigate a wave of coordinated Wesen gang vandalism that results in the death of a local business owner and the kidnapping of Monroe and Rosalee's friend. As they dig deeper, they learn that Portland wasn't the only city hit with a wave of violence. Meanwhile, Truble fills Nick and Adalind on what she has been up to. Elsewhere, Capt. Renard dips his toes into politics as he endorses a local candidate.

Monroe gets a call from a relative in Germany that will bring Nick closer to his ancestors. Things get complicated when the nefarious group Black Claw is also after the same artifacts. Elsewhere, Capt. Renard helps a mayoral candidate get an edge on his opponent. Meanwhile, Trubel confronts Eve about Nick and Adalind.

Nick and Monroe find a treasure in Germany that has been hidden for centuries. Back in Portland, Capt. Renard joins Hank and Wu to track down a deadly assassin who has thrown Portland into havoc. Little do they know that Eve is on a hunt of her own for the same man. Meanwhile, someone from Rosalee's past tracks her down.

An evangelical preacher has a tent revival unlike any other when he uses his Wesen identity to gain more believers. Nick and Hank are called to the scene as things escalate when a group of "true believers" are hell bent on saving the preacher and his flock by any means necessary. Meanwhile, Capt. Renard takes further steps to gain power in local government. Elsewhere, Eve uses Adalind's ol' hat trick to gain more access to Black Claw.

Black Claw makes a strategic move against Hank that shocks everyone and sends Nick on a war path. Hadrian's Wall ramps up their investigation as they seek out a mysterious man named Bonaparte. Meanwhile, Adalind and Capt. Renard must learn to deal with their new and very unpredictable reality with Diana.

الكابتن رينارد يتعهد بقتل نيك بعد المذبحة في شقة نيك.

هانك ووو يجدون حلاً لوقف رينارد بينما يقوم نيك بالهرب. تتلقى أداليند مكالمة تلقي بها في وسط كل الأحداث. مغامرة حضانة مونرو وروزالي تأخذ منعطفًا مثيرًا عندما يشهدون قوة ديانا.

ويسن قوي يُدعى "زيرشتورر" يصل إلى بورتلاند، بنية للقيام بشيء ما مع ديانا. يعود نيك إلى المنزل الذي حل فيه أول قضية ويسن له للبحث عن حلاً. ومع ذلك، يكون "زيرشتورر" خطوة واحدة أمام الفريق.

نيك يواجه أعظم خصم لديه، حيث يبدو أنه لا يوجد سلاح يمكنه هزيمته. مونرو، روزالي، وإيف يبحثون عن إجابات قد تساعدهم في المعركة. رينارد وأداليند يحاولان الحفاظ على سلامة ديانا وكيلي.